Automatic ventilator



Dec. '1.99 1939o L. H. BEAN 283955 AUTOMATIC vnNTxLAToR v Filed Augfas. 193s 2 sheets-sheet 1 INVENT OR.

'ET-l- Dern 19, 1939. L. H. BEAN p 2,189,955

AUTOMATIC VENTILATOR v Fild Aug. 29. 1958 v 2 sheets-sheet 2 INVENTOR ATTORNEY.

. Patented De@ 19,1939

Nr... n

UNITED STATES PATENT-f oFFICE The principal object of my invention is to provide a ventilator for windows and like `openings that'automatically `yieldingly closes when subjected to storm or a bad wind and then auto matically opens after the lstorm has passed or.y

wind has gone down.

A further object of my invention is to provide an automatic ventilator that approaches a closed through it.

A still further object of my invention is to provide an automatic. ventilator that may be easily and quickly adjusted to t various'window'or like widths. I

A still further object of this invention is to provide an automatic ventilator that is economical in manufacture and durable in use.

These and other objects will be apparent to' those skilled in the art.

20 My invention consists in the construction, ar-

rangement and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth,

pointed out in my claims and illustrated inthe accompanying drawings, in which:

Fig. 1 is a side view of my ventilator shutter with -sections cut away and with dotted lines to illustrate its telescoping feature for fitting various window widths.

Fig. 2 is a, top plan view of my device with dotted lines showinghow it fits into a window frame Fig. 8 is a side view of one ofv the vanes of the device.

35 Fig. 4 is a cross sectional view'of myven'tilator' dow frame and the under edge Vof the window.

The objections to these ventilators, however, are that the amount of air passing through them depends entirely upon the fo'rce of the wind and Athey do not automatically close during a bad wind storm. I have overcome such objections by providing an adjustable window ventilator that automatically regulates and'c'ontrols the amount of air passing through itl and. in case of bad storms, Vautomatically closes, thereby eliminating the necessity during suchtimes of reev condition relative to the force of draft passing.-

moving the samevfrom the window fram and shutting the window.

Referring to the drawings, I have usedthe numerals I0 and II todesignate the two Vertical`- frame end portions of my device. These two end 5 portions'have their center portions restricted to Aenter a windowvframe I2 as shown by 4dotted lines in Fig. 2. The numeral I3 designates an upper portion of the frame of the device rigidlyA secured to the upper end ofthe member IIL l0 This member I3 extends'horiz'ontally and is of side ledges curved inwardly as shown in Fig. 4.

A similar member' I4 extends horizontally from and is rigidly connected to the upper gend of the 15 member II. This upper, frame portion Id' is also ofinverted trough -construction and has its two lower edges bent and curved inwardly. The inverted trough I4, however, is slightly smaller than the Ainverted trough I3 for permitting' this 2 0 member I4 to slide within and telescope within the member I3 as shown in Fig. 4. The numeral I5 designates Athe lower portion of a frame rigidly secured to the lower end of the member i0.- This member I5 extends horizontally from the mein- 2'5 ber I0 and is of inverted U-shaped cm'istructiony in cross section having its top sloping upwardly ingoinwardly and upwardly from its 'two sides and 'terminatingin a circle or bead I Il as shown in Fig. 4. The dimensions of this member I'I are'slightly less than the dimensions of the member I5 in order that the member ,I 1 will 0 slidably extend into and telescope wthinthe member I5 as shown in the drawings. The lower edges of the frame member II extendinwardly and rest within the lower portions of the member I5 and the member I8 slidably extends within 45 the member I6. From this construction it is obvious that a telescoping frame is provided hav-- ing 'a side portion-I0, a top portion consisting of members I3 and I4, a, side I I, and a lower pornon consisting of the members' ls and 1. s ucn 50 a telescoping frame may be slidably extended or compressed to fit various window openings. This telescoping feature also makes possible the place 4ment inor removal from a window frame casing as shown in Fig. 2: ToAprevent the complete projections 20 are near the forward end of the removal of the left section of the frame from the right section, I have provided stop means. In the curved side edges of the member i3, I have cut and bent ears i9 which are capable of being engaged by projections 20 cut and formed in the curved portions of the side edges of the member I4 as shown in Fig. 6. These members I9 are near the forward end of the member I3 and the member i4. Obviously, the projections 20 will engage the ears I9 to prevent the complete withdrawal of the right side of the frame portion from the left side portion as far `as the upper portion of the frame is concerned. The lower portion of the frame has similar stop means -in that ears 2| are cut and bent in the forward end of the side edges of the member I5 and upwardly extending projections 22 are formed in the forward end of the side edges of the member i1 as shown in Fig. 6 and Fig. 4. These stop projections 20 and 22 prevent the complete withdrawal of the two frame sections from each other. 'I'he numeral 23 designates a Vplurality of spaced apart vertically arranged bracket projections on the inner side of the member I0. The numeral 24 designates a similar bracket projection extending from the inner side of the member il and-directly opposite the bracket projections 23 respectively. These bracket projections 23 and 2li extend horizontally inwardly and then upwardly as shown .in Fig. 3, and are centrally llocated relative to the frame portions l0 and Il.

The numeral 25 designates a plurality of movable shutter vanes. Each of these vanes are inverted U sl'iaped in cross section. having a semi-circle 'portion 25 at their centers as shown in Fig..5.

From 'this top center-circular portionthe -vanes extend downwardly and outwardly in curved paths. The numeral 21 designates a hole in the top of each o f the elongated shutter vanes near the left end of each oi the shutter vanes. On each of the bracket projections 23 is a shutter vane and this is accomplished by theA upwardly extending portion of eachof the bracket projections 23 extending through an opening 21 of a shutter Vane. vThe bracket projections 23 are sov spaced apart, and the shutter vanes are of suchdimensions that the lower side portions of a shutter vane will extend in spaced relationship around the portion 26 of the shutter vane just below it as shown in Fig. 5. Ihe lowermost of the shutter vanes 25 has its two lower sides loosely embracing the portion 26 oi the member I5. As the center of gravity of each of the shutter vanes is below their pivot point on the brackets 23, these shutter vanes will normally suspend in positions as shown in Fig. 4. The numeral 28 designates the shutter vanes operating on the bracket projections 24 of the member Il. These shutter vanes 28 are in construction exact duplicates oi the shutter vanes 25 except, they are slightly smallerin order to telescope-and engage with the shutter vanes 25 as shown in Fig. 4. 'Ihese shutter vanes 28 also have a center circular portion 29 similar to the portion 25 of the vanes 25. The portion 29 of the shutter vanes 28' slidably extend into the portions 26 oi' the shutter vanes-25. The numeral 30 designates an opening in the upper end portion of each of the shutter vanes 28 for'receiving the upwardly extending'portions ofjthe. brackets 24.- By this construction, a shutter vane 25 engages a shutter vane -28 directly opposite from it and each such pair of shutter-vanes provides to all intents and 'I6 purposesa Single elongated shutter vane sus.-

v'gravity in normal positions as shown in Fig. 4

and air will pass under the one side edge of the shutter, thence upwardly around the upper portion of the shutter just below it, and then downwardly and outwardly and through my ventilator. However, if the air velocity is seriously increased, it will move the lower ends of the shutters inwardly, thereby restricting the openings through which the air previously normally passed. This restriction of the openings through the device will at all times be relative to the velocity of the air passing through the device. If the Velocity reaches storm proportions, it will move the lower sides of the shutters on the side of the wind completely inwardly to 'engage the center portions of the shutters directly below each shutter as shown in Fig. 5, thereby completely automatically closing my ventilator. Obviously, my ventilator acts as an automatic valve for controlling the ilow of air in either direction through the device. As soon as the velocity of the air decreases to a point Where gravity is the stronger of the two, the vanes will accordingly open and again permit circulation of air through the device. The owner may safely forget its installation as it will automatically regulate or completely cut off the amount of air passing through it. There is no cost to the opera-tion of my device inasmuch as it'functions entirely by the force of gravity as opposed to the force of the air currentl passing or attempting to pass through it. My device is easily manufactured as all of its parts maybe stamped and bent from sheet metal material.

When the device is partially closed or closed, the lower sides of the elongated shutters at the bottom of the device approach or engage the portions |6 and i8 of the frame and the uppermost shutters will approach or engage the curved lower side edges of the frames i3 and I4. Some changes may be made in the construction and arrangement of my improved automatic ventilator without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modied forms of structure or use of mechanical equivalents which maybe reasonably included within their scope.

I claim: 1. InA a device of the class described, a frame, a plurality of shutter vanes each inverted U- shaped in cross section and having a circular said bead of each of said second mentioned shut-` ter vanes slidably engaging the circular housing or one of said first mentioned shutter vanes, and

a means for pivotally mounting each lset of.

shutter vanes in said frame.

f 3. In a device of the class described. a frame,

a `pli1rality of shuttei' varies each inverted U- shaped in cross section and having a `circular housing along its' centez` line, a second plurality of shutter vanes each inverted--U-shaped in cross section and having a bead along its center line;

saidbead of each of said second mentioned shutter vanes slidably engaging the circular housing of one .of -said metl mentioned shutter vanes;

each of said shutter vanes having an opening in its end portion adjacent said frame, and a plurality of projections on said frame engaging the openings in said shutter vanes respectively.

,melma BEAN. 

